Electric lamp socket



No 5 933 A. H. NERO 1,98%07 ELECTRIC LAMP SOCKET Filed May 24, 1929 Y "Nm 0 16: "1101 f [l 9 nunnnlllmi 2 lllllll'a'li 59 56 ull" l '/I 2i, INVENTOR 62 l I ARvln Hmm@ 5g, l 7 En? hals' aZ-wwfjey Patented Nov. 6, 11934 UNITED STTS cargar orrica Application May 2i, 1929, serial No. 365,683

Claims.

This invention relates to electric lamp sockets and more particularly to those types of electric lamp sockets which are used in electric lcandle Xtures and which often have an electric)` switch structurally combined therewith.

It is an object oi my invention to simplify the construction of the above type of lamp sockets to decrease their cost of manufacture and the time required to assemble and installgthem.

Another object of my invention is to provide an improved supporting means for electric lamp sockets of the above types.

Other objects will be apparent as my inwention is described in connection with the accompanying drawing in which y Fig. 1 is a broken iront elevation section view of my lamp socket invention with the section taken upon line 1-1 of Fig. 4.

Fig. 2 is a broken side elevation section view of my invention taken upon line 2 2 of Fig. 4.

Fig. 3 is a broken front elevation of my lamp socket invention.

Fig. 4 is a top plan View of my lamp socket invention.

Fig. 5 is a detail view of the single member used to space the insulating plates and secure the lamp socket above them.

Fig. 6 isa detail view of the insulating disc which I locate within the screw shell in practicing my invention.

Fig. y'7 is a fragmentary detail view of a lower corner of one of the insulating plates showing the binding terminal construction which I use in practicing my invention.

Fig. 8 is a section view of the hickey used in my invention, the section being taken on line 8 8 of Fig. Y2.

Referring to the drawing it will be noted that a conventional screw shell contact 10 is placed upon the short edges of two parallel, rectangular, spaced, insulating plates 12, 14. These plates are located in planes substantially perpendicular to the bottom of the screw shell and are assembled in that position by means as hereinafter described.

For the purpose of insulating a center lamp contact 20 from the bottom of the screw shell 1 place in the bottom of the screw shell an elongated, slotted insulating disc with rounded ends. The center lamp contact is made of a strip of metal having ears 21, 22 laterally projecting from its middle portion and bent at right angles so as to extend through apertures in the insulating plate 12, the ends of the ears then being bent over on the plate 12 to hold the center contact to the plate. The top of the center lamp Contact projects through an aperture 13 in the bottom of the screw without engaging the shell and it then extends through a slot 16 in the insulating disc 15, and is bent over so it may be engaged by the center contact of an electric lamp when an electric lamp is Ascrewed in the shell. f

To hold the insulating disc 15 in the shell and at the same time to space the insulating plates 12, 14 and secure them to the shell 10, placey a securing ring within the shell and upon the disc l5. This ring has diametrcally opposed extensions 32, 34 of equal width. These extensions are bent down at right angles to the plane of the ring, and extend through slots 37, 39, in the bottom of the screw shell and between the plates 12, 14. Projecting laterally from the eX- tensions 32, 34 are ngers 33, 35 whichprotrude through small apertures in the upper portion of the plates 12, 14. The ends of these iingers are deformed or spread in order to secure the plates in spaced parallel relation to each other and to hold them beneath and perpendicular to the bottom of the screw shell. Y

To securely hold the disc 15 to the bottom of the screw shell diametrically opposed and downwardly bent lugs 36, 38 are formed upon the periphery of Athe securing ring 30. These lugs are -angularly spaced approximately 90 from the extensions 32, 34 o f the ring. The lugs project through small slots in the bottom of the screw shell and their ends are bent over thus clamping the screw shell 10, insulating disc.v 15, and ring 30 securely together.

It will be noted that I make the extension 34 longer than the extension 32 and I provide it with a binding screw. This extension 34, while acting to hold the plates 12, 14 in spaced relation also acts as a binding terminal for the screw shell.v v e To support the above described socket mechanism I provide a two piece adjustable hickey having upper and lower members 40, 42 slidably engaging each other. The upper member consists of` a straight strip of metal having a series of right angle bends in it giving the upper end of the member a hooked formation. The top horizontal portion of the member 40 has laterally extending iingers 44 which project through small apertures in the lower ends of the plates 12, 14 and have their ends spread to secure the plates and hickey together.

The lower member 42 of the hickey also is formed oi a strip of metal and has a right angle 12, Y14 carries a movable switch contact 52 which of Harry T. Paiste, Serial No. 315,532.

bend at its lower end producing a horizontal portion 42 whichis apertured and contains an internally threaded boss by means of rwhich the socket may be screwed to a xture in the usual manner.

rIhe vertical portions 41, 43 of the hickey members 40, 42 are laterally curved (see Fig. 8) as by depressing each of the membersalong its longitudinal axis while maintaining its longitudinal edges in their original plane.

In order that the height of the screw shell above the boss 45 may be changed to suit the varying conditions of use a long centrally located longitudinal slot 46 is provided in the lower member 42. Through this slot a securing screw 47 passes to a threaded aperture located at the lower end of the upper member 40,;` To guide the sliding of `the upper member on the lower member, a hole 48 is punched throughthe middle of the upper `member a short distance from the screw apertureiand vthe periphery of the hole is extruded so that the edges of the longitudinal yslot'46 rub against this extruded periphery 49 and are guided thereby when 'the hickey is extended or retracted.

To control the current-through the socket A:I place a switch mechanism between the plates 12, 1,4. This switch mechanism forms no' pa'rt of thisV invention and will therefore only be described briefly to show its cooperation in the present combination.

The switch spindle -50 which is journalled transversely fthrough thev center off the plates bridges two stationary switch contacts 54, 56. The stationary switch contact 54 is formed integral with and Iextends laterally from the lower end of the centerlamp contact 20. This switch contact 54 extends into and across one of four curved concentricA apertures 57, 58, 59, which are spaced equal distancesfrom and about the spindle hole in the plate 12.

' The stationary switch contact 56, extends across and ldown'into-anotlier of' the segmental slots, i.V e. 60, which is diametrically opposite to the segmental slot'58 inwhich the stationary switch Contact 54 is.

This 'switch' contact -56 4is formed integrally with a binding terminal plate '62 located under a lower corner of the plate 121 Ears 68 project perpendicularly from the plate 62 and are bent over the plate 12 to hold the plate 12 and terminal plate 62 together. `A portion of the *corner of the plate l2 is cut away over the plate 62 to form a pocket 65 furthe head of a binding screw v64. This is a Very desirable construction because the rounded edge of the pocket 65 will hold a lead wire ledaround the shank of the bindingl screw 64 from slipping out from under'the screw head, when the screw is being terminal plate. The bridging contact is actuated by a chain '70 through mechanism substantially as described in the copendingapplication Since this switch mechanism forms no part of this invention it -need not be further described herein.

When the switch is in circuit making position,

the current from the source of power may enter the device through the terminal plate 62, pass through the switch contacts 56, 52, 54 to the center lamp contact'20, then pass through the lamp which may be screwed in the socket;-` then to the screw shell l0 and securing ring SO'gand the binding terminal 34, back to the sources@ Power. v

Many modications within the scope of my invention will occur to those skilled in the art, and therefore IV do not limit Vmyself to the specific embodiment shown, but,

I claim:

1. An electric lamp socket comprising a screw shell, a plurality of substantially parallel spaced insulating plates, a slotted insulating discgwithin said shell and a single means spacing said plates apart, securing `said disc in said shell, and mounting said shell over said plates, in combination with a center contact secured to `,one of said plates and projecting through a slot in said d c.

2. I an electric lamp socket and switch device, mutually insulated screw shell and center lamp ctontacts, a slotted insulating disc within said shell, a plurality of substantially parallel spaced insulating plates assembled beneath said shell, and a single member securing said disc in said shell, spacing said plates apart beneath. said shell, and holding all the aforementioned parts in'asse'mbled position, in combination with.

swit h mechanism located between said plates, said switch"V mechanism 'comprising iixed and movlable contacts, one of said fixed contactsbe ing f formed integrally with said center lamp contact.

3j. In an electric lampj socket and switch device, mutually insulated screw shell and center lamp contacts, a slotted insulating disc within said shell, a plurality of substantially parallel.

spaced insulatingplates assembled beneath said.

shell and asingle member securing said disc in said-shell, spacing said plates apart beneath. said shell,4 and holding all the aforementioned parts'in assembled position, in combination with switch mechanism located between said plates.

said switch mechanism comprising Xed and movable contactsfone of said iixed contacts be ing formed integrally with said center lamp contact, `another of said fixed contacts being formed integrally withy a binding terminal.

4. An electric lamp socket comprising mutually insulated screw shell and center contacts, a plurality of spaced insulating plates, an insulatingl disc within said shell, a'single means spacing@ said platesapartbeneath said shell and securing said disc within said shell, and a binding terminal formed integrally with said single means.

5.,'An electric lamp socket comprising mutual- 1 a single member holding saidl plates-and said l shell in Aassembled position, and a binding terminal 4formed integrally with said single means.`

ARVID H. NERO.

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